A polyamide Nylon 7, can be made from the ring opening polymerization of the cycloactam of 7-aminoheptanoic acid or by its direct condensation polymerization of 7- aminoheptanoic acid. If 7-aminoheptanoic acid has a number average molecular weight of 145 and if in both cases the nylon 6 has a number average molecular weight of 25,400 what is the average degree of polymerization DP of each polymer?